Excavator



Mar. 13, 1923.

L. P. GREEN EXAvAToR Filed June 16, 1921 Patented Mar. 13, 1923.

PATENT LESLIE I. GREEN, 0F CHICAGO, ILLNOIS.

Exam/Aron.

Application-@led JunelG, 1921. Serial No. 477,939.

To all 'whom t may concern.'

' Be it known that yI, LESLIE B. GREEN, a citizen of the Unitedy States, yand a resident of thecity of'Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Excavators, of which the following is a specification.

My invention relatesto improvements in excavators, and has for its object the provi- Ysion of an improved' construction'l of` this character which is simple and efficient in use.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed. Y y

The inventionwill `be best understood by reference to the accompanying drawings forming a part of 'this specification, and in which, v

Fig. '1 is a side view of bodying the invention; i

Fig. 2, an end view thereof; and

an excavator `em- Fig. 3, a detail view' of a stop member.,

employed in the construction. y

The preferred form vof construction as illustrated in the drawings comprises a suitable supporting cable 4 which is stretched over an `varea to be excavated in the usual manner. A' carriage 5 :equipped with grooved supporting wheels 6 is arranged to travel on said supporting cable over the area to be excavated in the usual manner, and a. stop clamp 7 is adjustably secured to `the cable 4 so as to stop the'travel of said carriage at any vdesired point in its travel on said cable. y Two triangular rocker members 8 are pivoted at 9 oncarriage 5 and links 10 and 11 i are pivoted, as shown, to the corners of members 8 on opposite sides of the pivots 9. An excavating bucket 12 is pli-voted, as shown, to the lower ends of the linksl() andll' and is balanced to carry itsload.V A draw cable 13 is connected to cause thecarriage 5 and the bucket 12'to traverse the area to be excavated. The cable `13 is provided `with two branches 14 and 15. The branch 14 consists of two diverging cable strands leading and attached to eyes 14 on the forward edges of the excavating bucket 12V as shown. The branch'l likewise consists bf two ldivergent strands passing vover 'grooved guide pulleys Fries. y

16 on carriage 5 and connected with eyes 17 onY the rocker members 8 as shown, the

branches 15 passing close to but above the pivotal axis 9. y

Inv operation, the cable 13 is manipulated inthe usual way-to permit the carriage and bucket. to slide down the same under gravity over the area to be excavated whereupon the cable 13 is operated as a draw cable t0 draw the excavating bucket over the area to be excavated, filling the same with material in the usual way, said material being lifted by lthe upward inclination of the supporting cable. 4 andvcarried in the bucket until the Astop 7 is encountered, said stop being positioned at the point where it is desired to dump the excavated ymaterial. When the stopv 7 is encountered by` the carriage 5, further travel of said carriage is prevented, y

whereupon the bucket 12 will be caused to swing forwardly by the tension on cable 13. This will throw tension onto the cable strands 15 and thence onto the eyes 17 on the rocker members- 8. The cable strands 15 passing above the pivot points 9 will cause the rocker member 8 to rock forwardly int-o the dotted line position indicated in Fig. 3. This will cause links 11 to elevate the rearward end of the bucket 12 and links 10 to lowerthe forward end thereof, thus dumping the contents Aofsaid bucket as indicated in dotted lines in Fig. 1. When tension on cable v13 isrelieved, the bucket 12 assumes its normal position bythe action of gravity yand because it is balanced to do so, such saw assumptionbeing in any event forced by f contactof the bucket with the ground as the carrlage' slides down the cable 4. Renewal of the drawing force on cable 13 will` repeat v vthe'operation again, illing the excavating bucket and dumping' the same as above outlined'. If the cable strands 14 are adjusted a little longerl than indicated, the carriage will'be drawn along cable 4 by the tension Vin cable strands', 15 until lthe stop is encountered,when `the dumping action will' take place as before. The added slack in cable `strands`14 permits more free dumping'movement of the ybucket and thus a completeupending thereof to facilitate discharge. In

either arrangement; a simple and eii'ective excavating mechanism is provided which will carry its load to the desired point and the y #sitively dump and discharge the same at any desired point.

lVhile l have illustrated and described the preiferred form of construction tor carrying my invention into effect; this is capable ot variation and modiication without departing trom the spirit oi" the invention. l; therefore; do not Wish to be limited to the precise details ot the construction set iorth; but desire to avail myseli ot such variations and modifications as come within the scope or the appended claims.

vHaving described my invention., what l claim as new and desire to secure by Letters Patent is: i

l. An excavator comprising a supporting cable; a carriage traveling thereon; a stop for said carriage; an excavating bucket swingingly suspended on said carriage; means onfsaid carriage 'ier dumping said bucket; and a draw cable operatively attached to said bucket and said dumping means. and arranged to dump said bucket forcibly by tension on said draw cable when said carriage encounters said s top; substantially as described.

2. en excavator comprising a supporting cable; a carriage traveling thereon; a stop 1Cor said carriage; an excavating bucket swingingly suspended on said carriage and balanced to carry its load; means on said carriage tor dumping said bucket; and a draw cable operatively attached to said..

bucket and said dumping means, and arranged to dump said bucket forcibly by tension on said draw cable when said. carriage encounters said stop; substantially as described.

3. An excavator comprising a. supporting cable; a carriage traveling thereon; a. stop tor said carriage on said cable; an excavating bucketl swinginglv suspended ou said. cz brie; means on said carriage :tor dumping said bucket; and dran' cable having branches; one leading 'to said bucket TAV() and the other to said dumping means; the ot said branches serving to draw said carriage and bucket along` said supporting cable. and the other branch servin to dump said bucket 'lorc'ili-le by tension on said draw ceble when i. p. substant desv'cribed. 'tlf-fin er avato" comprising supporting cable; a ce. iage traveling thereon; a. stop Y'Eer carriage ou said cable: an excavating bucket swingiugly suspended on said Carr' le and balanced to carry its load: means on said carriage tor dumping said bucket: and a draw cable having two branches; one leading` to said bucket and the other to said dumping means;y the first of said branches serving to draw said carriage Caid ve encounter-s said and bucket along said supporting cable, and the other branch serving to dump said bucket Yforcible by tension on said draw cable when said carriageencounters said stop; substantially as described. l

5. An excavator comprising a supporting cable; a carriage traveling thereon; a stop for said carriage; va. rocker member pivotally mounted on said carriage; supportingl links pivoted to said rocker member; an excavating bucket pivotally carried by said links; said bucket being arranged to be dumped by rocking of said rocker member; and a draw cable operatively connected with said bucket and With said dumping means, substantially as described.`

6. An excavator comprising a supporting cable; a carriage traveling thereon; a stop for said carriage on-said cable; a rocker member pivotally mounted on-'said carriage; depending supporting linksfpivoted on said rocker on opposite sides of the pivot thereof; an excavating bucket pivotally suspended on said links and balanced to carry its load; and arranged to be dumped upon rocking of said rocker member on said carriage; and a draw cable having tvvo branches; one leading to said bucket and 'the other to said dumpingmeans; substantially as described.

7. An excavator comprising a traveling carriage; an excavating bucket swingingly mounted on said carriage; a draw cable having two branches; one branch leading to said bucket and the other to said carriage; and means on said carriage; operable by the shitting of tension onto the cable branch leading to said carriage for dumping said bucket, substantially as described.

8. An excavator comprising a supporting cable; a carriage traveling thereon; a stop for said carriageV on said cable; triangular rocker members pivoted on said carriage; supporting linksy pivoted to said rocker member on opposite sides of the pivot thereot; an excavating bucket suspended on said Vlinks and balanced. to 'carry its load; and a draw cable. having two branches, one branch leading-to said bucket and the other to said rocker member; and adapted and arranged to rock said rocker member When tension is shifted thereon; substantially as described.

9. n excavator comprising a supporting cable; a carriage traveling thereon; a rocker member on said carriage; an excavating bucket; asupport for one end of said bucket connected 'with said rocker member; a support for the other end of said bucket connected kWith said. rocker member; and means tor rocking said rocker member; substantially as described.

10. An excavator comprising a supporting cable; a carriage.- traveling thereon; a stop :for said carriage 'on said cable; a rocker member pivoted on .said carriage; an excavating bucket swingingly suspended'on said rockermember on opposite sidesof the pivot naine to rthis specification in the presence thereof; and a draw cable having tvrlo of two Subscribing Witnesses. 4 branches one leadino' to said bucket and t e v other to ,said rockernember and adapted to v f LESLIE P GREEN' 5 rock said rocker member upon stopping of f \V1tne sses: v said carriage, substantially as described. .JOSHUA R. H, Poms, L Iny testimony whereof I have signed my FREDA C. APPLEfmN. 

